Bill passed on November 20 in La Jolla, California. Bill was Distinguished Professor Emeritus, as well as the immediate past Chair of the Department of Radiology at UC San Diego. Bill was a former president of the International Society for Magnetic Resonance in Medicine (ISMRM) and a deputy editor for the Journal of Magnetic Resonance Imaging (JMRI) during our entire tenure and was active in reviewing papers even while ill and hospitalized. I have had the utmost respect for his judgment and insight. The journal was and is inarguably better due to his service. On behalf of JMRI, we extend our deep condolences to Bill's family, including his loving wife Rosalind (Roz) Dietrich, MD, FACR, Professor of Radiology, UC San Diego, and his beloved children David, Kristin, India, and Felicity. Bill was one of the most accomplished radiologists of his generation. Bill had the depth and breadth of knowledge, training, and brilliance that allowed him to be successful in every phase of his career. He walked easily between the worlds of academic radiology and private practice, always remaining committed to teaching, and to the pursuit of new knowledge and ideas. Bill never stopped, and lived life to the fullest. He had a huge personality, with an infectious laugh, a laugh that none of us will ever forget. When he was in a room, all eyes were drawn to him, whether for his clinical wisdom, or just to hear one of his many funny stories. In spite of his many accomplishments and successes, Bill was amazingly humble, approachable, kind, and warm. One of our enduring memories of him is from the early days of MRI education. Michael Zlatkin was on the faculty with him in some far away venue. Michael was a latecomer to the group assembled and not long out of training, thus he. Mike was understandably in awe of Bill and of the other course faculty members. Bill just walked up to Michael and said, “I hear you are the shoulder guy, welcome to the MRI Mafia.” With just those few words he put Mike immediately at ease, letting him know that he belonged. If there was an MRI Mafia, Bill Bradley was certainly its Godfather, and the ISMRM was La Costa Nostra. Bill obtained his bachelor of science degree at Cal Tech, and his PhD in Chemical Engineering from Princeton. Owing to this background, Bill was able to comprehend MR physics and to teach it to others. Bill performed seminal work in our field, including describing flow phenomena (such as even echo rephasing) and the breakdown of blood products. Bill Bradley was a man ahead of his time and a great visionary. In fact, some of the most current areas of interest in neuroimaging, such as hydrocephalus, cerebrospinal fluid flow, and multiple sclerosis rely on and make reference to work Bill Bradley initiated. Bill did his radiology training at UC San Francisco, where he was greatly influenced by the Chair at that time, Alex Margulis. From UCSF he brought his boundless energy and skills to the private practice world, first at Huntington Memorial Hospital in Pasadena and then at Long Beach Memorial Hospital. Bill returned to academic practice at UC San Diego. During his tenure at UCSD the radiology department became a national leader in the NIH funding rankings. He did this by recruiting both established world leaders as faculty members, while also hiring and mentoring a new wave of innovators and leaders who joined his faculty. He was also able to forge vital partnerships with many industrial partners. Over the course of his career, Bill Bradley published over 200 articles, 54 book chapters, and 21 textbooks. He is also known for coauthoring and editing one of the early definitive reference textbooks on MRI, Magnetic Resonance Imaging, with coauthor and coeditor David Stark, through three editions. Bill was also on the Editorial Boards of 10 scientific journals and was a charter member of an NIH Study Section (BMIT) from 2004–2008. Bill Bradley was the recipient of gold medals for distinguished lifetime achievements from the most prestigious radiology societies: the Radiological Society of North America (RSNA), the American College of Radiology, the ISMRM, the American Roentgen Ray Society (ARRS), and the Association of University Radiologists (AUR). Besides ISMRM, Bill was active throughout his career in organized radiology. He was past president of the Board of Trustees of the Radiological Society of North America Research and Education Foundation (1995–2001) and served as the Chairman of the Fund Development Committee of that organization from 1996 to 2008. Bill was on the Board of Chancellors of the American College of Radiology, where he chaired the Commission on Neuroradiology and MRI from 1999 to 2005 and served as Vice President from 2005–2006. Bill was Chair of the Steering Committee for the Coalition for Imaging and Bioengineering Research and on the Boards of the Academy of Radiology Research, Association of University Radiologists, International Society for Strategic Studies in Radiology, and Academy of Radiology Leadership and Management. Most recently, Bill was the Chief Medical Officer for CureMetrix, and played an important role in bringing forth and improving their mammographic Computer Aided Detection software. We have truly lost a giant, and a dedicated and vital member of our Society. He was a great radiologist, true pioneer, master innovator, wonderful teacher, speaker, writer, mentor, and leader. But to those of us who were lucky enough to know him personally, Bill was just a great guy. He was someone who made everyone around him feel comfortable, and inspired us to greater heights. His research, teaching, and academic leadership benefitted patients not only in his local area of practice, but around the world. Hence he made the world a beter place, and he will be sorely missed by all. Many thanks to Larry Muroff, MD, FACR, Bill's longtime great friend, for sharing the memoriam written by Alex Norbash, the current Chair of Radiology at UCSD, from which many of the details of this tribute are drawn. Michael B. Zlatkin, MD, FRCPC NationalRad Deerfield Beach Florida, USA Mark E. Schweitzer, MD Stony Brook University Stony Brook New York, USA